199019972400 has 120 divisors (see below), whose sum is σ = 675028987344. Its totient is φ = 49950105600.

The previous prime is 199019972369. The next prime is 199019972423. The reversal of 199019972400 is 4279910991.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4857541 + ... + 4898340.

Almost surely, 2^199019972400 is an apocalyptic number.

199019972400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

199019972400 is an abundant number, since it is smaller than the sum of its proper divisors (476009014944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

199019972400 is a wasteful number, since it uses less digits than its factorization.

199019972400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9755919 (or 9755908 counting only the distinct ones).

The product of its (nonzero) digits is 367416, while the sum is 51.

The spelling of 199019972400 in words is "one hundred ninety-nine billion, nineteen million, nine hundred seventy-two thousand, four hundred".